Liquid-fuel burner



Patented Feb. 9, 1926.

UNITED STATES JAMES B. BIRD, OF VANCOUVER, WASHINGTON.

LIQUID-FUEL BURNER.

Application lcd'December 10, 1924. Serial No. 755,044.

To all 'whom t may concern:

Be it known that I, JAMES B. BIRD, a citizen of the United States, residing at ,V ancouver', in the county of Clarke and State of lfVashington, have invented certain new and useful Improvements in Liquid-Fuel Burners, of which the following is a speci- Iication.

This invention relates to liquid fuel burners.

An object of the invention is to provide a burner, the capacity ofv which may be adjusted within certain limits to permit a standard burner of one size to be employed for diierent requirements.

A further object of the invention is the provision of a burner that may be readily cleaned without dismantling.

A further object of the invention is the provision of means for controlling the supply of air delivered to the burner for supporting combustion.

In the accompanying drawings, I have shown one embodiment of the invention. In

" this showing Figure 1 is a central vertical longitudinal sectional view,

Figure 2 is a vertical transverse sectional view on line 2-2 of Figure 1,

Figure 3 is an enlarged longitudinal sectional view of the burner tip,

Figure 4 is a transverse vertical sectional view on line 4-4 of Figure 3,

Figure 5 is a perspective view of the burner tip, and,

Figure 6 is a detail sectional view on line 6-6 of Figure 1, showing the means for securing the air control slide in an adjusted position.

Referring to the drawings, the reference numeral 1 designates a furnace wall which is provided with an opening for the reception of the burner. The burner comprises an outer casing 2 of substantially the same diameter as the hole in the furnace wall and the rear end of the burner is provided with a flange 3, adapted to receive suitable fastening elements 4 by means of which it is held in position. A central pipe extends longitudinally of the burner casing and is retained in position by suitable supporting members 6. The forward end of the pipe 5 is surrounded b v an air cup 7, which is open at the front and provided with a rear wall 8., This rear wall is provided with a plurality of spaced concentric openings 9. As shown, the cup is secured to the burner pipe by means of a set screw 10.

A burner tip 11 is arranged on the end of the burner pipe and secured thereto by means of a set screw 12. As shown, the tip is of larger diameter than the pipe. The tip is provided with a tapered or inclined inner surface 13. The end of the pipe is closed by a plug 14, having a plurality of openings 15 formed therein. This plug is secured to a rod 16 which extends longitudinally through the burner pipe and the rod extends beyond the plug and is provided with an enlargement 17 on its end which substantially closes the burnertip. As shown, this enlargement is provided with plurality of beveled or tapered faces 18, each of which is of smaller diameter than the adjacent outer face. The forward edge of the burner tip is provided with notches or recesses 19 on each side.

The rear end of the rod 16 is provided with a socket adapted to receive a ball 2O formed on the end of a valve stein 21. This valve stem projects from the rear of the oil pipe, as shown, Vand is provided with an operating handle 22. Within the pipe, the stem is provided with threads 23 and a suitable packing 24 surrounds the stem. Steam is delivered to the burner from a pipe 25 passing through a valve 26 and oil is delivered from a pipe 27 passing through a valve 28. The steam and oil enter a common supply pipe 29 and are delivered to the rear of the burner pipe. The pipe 29'is pr vided with a slip joint 30 and is further provided with a union 31.

An air control slide consisting of a disk 32 is arranged on the oil pipe exteriorly of the furnace. This slide is adapted 4to be adjusted toward the furnace wall to control the supply of air delivered to the burner. As shown, it is provided with a central hub 33 surrounding the oil pipe and an eccentric clamp 34 is carried by this hub and is adapted to engage the pipe to retain the slide in a desired position.

In operation, oil and steam enter the pipes 27 and 25 to pass through the valves 28 and 26 to the common supply pipe 29. The steam is preheated to a temperature of about '75()n F., and is mixed with the oil when passing through the common supply pipe 29 and the burner pipe 5.. The mixture of oil and steam l ll) is fed through the openings 15, which thoroughly mix them and which break up the oil and prevent slugging. The outer plug 17 serves as an atomizing plug and further regulates the iame by adjusting the odset, tapered surfaces 18 with respect to the inner tapered surface 13 of the burner tip. The outerface of the burner tip is recessed, as at 19, for the purpose of deflecting the flame. The upper projection deflects the flame into immediate Contact, which would cause overheating and the lower projections prevent the oil from striking the bottom of the lire box before burning. The outer surface 18 of the atomizing plug is adapted to serve as a valve and to cut off the supply of fuel when moved inwardly. The ball and socket joint in the rod 1G permits the plug to be adjusted without turning it. The air control slide is manually adjusted to permit the proper quantity of air to pass into'tlie burner casing. Air entering the casing passes forwardly and a portion of it passes through the mixing cup 7 to the` burner tip. The remaining portion of air passes from the front of the casing to mix with the oil and steam delivered from the burner. By adjusting the cup 7, the amount of air drawn through the cup may be regulated. The amount of air delivered to the burner casing may also be adjusted by moving the entire burner in the casing.' This is acoomplished by means of the slip joint 30.

The burner may be cleaned by closing the valve formed by the atomizing plug 17, cutting olf the supply of oil and delivering steam through the burner pipe. The valve is then opened Wide and the steam will blow oil, sediment, or foreign matter from the entire burner.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the saine, and that various changes in the shape, size, and arrangement of parts may be re sorted to Without departing from the spirit of the invention or the scope of the subjoined claim.

I claim:

In an oil burner, a, burner pipe, a rod eX- tending through said burner pipe, a plug carried by said rod and substantially filling the outlet end of said burner pipe and adapted to slide therein, a burner tip carried by said pipe and extending therebeyond, the inner surface of said burner tip being tapered to increase in diameter toward its outer end and having an internal diameter throughout its length greater than that of said burner pipe, a head carried by said rod within said tip in close proximity to said plug, said head being tapered to correspond substantially to that of the inner surface of said burner tip and being provided with an inner face of substantial diameter arranged substantially at right angles to the axis of said rod, said plug being providedV with openings communicating between the interior of said burner pipe and the interior of said tip and being larrangedin the circle of materially smaller diameter than the diameter of the inner face of said head, and means for ad justing said rod.

In testimony whereof, I aiix my signature.

JAMES B. BIRD. 

